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FrozenGate by Avery

8 line TUNABLE argon

I still find it oddly humorous how this was received by you guys like a closely guarded secret on how to separate wavelengths. I feel like Prometheus handing over fire, lol.
 





I just never thought about the slit. I alzo figured they would be too close together at such a close distance but it seemed to work fine.
 
Nice new toy bloom - I'm jealous - go away on holidays, and come back and find yet another member has a new gas laser - and tuneable too!

Sig, I'll try the slit method once I get my argon - prolly mount it all on a baseplate I can get from a local metal suppliers, a couple of micro mounts, and find something I can use for the diffraction grating's stage :)
 
I would love to see a picture or video of the laser and how it tunes ...
 
Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
 
Wolfman29 said:
Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
Click to expand...

It depends on the lines/mm but a diffraction mirror will not have a 0 order unsplit beam so you get the most in each separated line.

I *think* a 3000line/mm grating will produce only a single order. I may be wrong, it has been many years since I've seen high grade gratings in person.
 
26_Ruled-Reflective5.png


Sig? This image seems to suggest that there are 0th order beams? It's from ThorLabs.
 
No idea then. I've seen one used in person years ago, there was no mixed beam visible but perhaps it was occluded somehow before exiting the aperture.
 
Not sure if this answers your question or not bu my 1800 line mirror produces 2 full 6 line sets and one mixed split off in between them.
 
Wolfman29 said:
Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
Click to expand...

There's a LOT of power loss anyway. Most of the beam isn't diffracted at all, and you'd be lucky to get much more than 15% in a single first order.
 
That's a shame. Then there is no way to split a beam without a huge amount of power loss, I take it? I was thinking may prism... but not sure.
 
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